
For a pump I had a random water gun pump just laying around.

The first thing that I did was drill a small hole in the back of the gun to accommodate the pump.
Sorry, no pictures.
Realizing that the pump was too big I shortened it.

Then I cut out the foam I used for silencing so that the pump could fit in the gun and glued it in.

Next I drilled another hole in the front of the gripe so that I could put the tubing for the hornet chamber into the handle. This will only work with the top two chamber of the hornet.

The chamber should fit in like the picture below.

Next I drilled two more holes into the grip, one in the back and one on the bottom.
Attach the hornet chamber to one of the blast buttons, using a T as shown

Finally attach the open end of the T to a pump in whatever is comfortable for you. I attached mine as shown.

Now for making this gun more comfortable. I found another pump for a water gun with a U shape on the back of it.

I cut the pump and attached the end of the pump to the pump in the stock and added some camping foam.

Now the finished product you have a backup shot to complement your PAS.

